Abstract

We report a precise and spatially resolved measurement of the complex degree
of coherence of a one-dimensional 1.5-keV beam produced by a third-generation
synchrotron source. The method of phase-space tomography is used, which requires
only measurements of the x-ray intensity. We find that the field is statistically
stationary to within experimental error, the correlations are very well approximated
by a Gaussian distribution, and the measured coherence length is in excellent
agreement with expectations.

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